Trigger mechanism.



E. F. HEDRIGK. TBIGGER MBCHANISM.

APPLIOATION FILED MAY 27, 1908. 906,419.

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Patented Dec. 8, 1908.

E.' P. HBDRIGK.

TBIGGER MBGHANISM. l APPLIoAnoNrILBD un 27,1908. 906,41 9. Patented Dec.' 8, 1908. asume-51mm 'z'.

"E, F. HEDRIGK. v 'IRIGGIJR. M BGHANISM. APPLICATION FILED MAY 27, 1908.A 4 906,41 9. Patelited Dec, 8,1908.

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structions and combinatlons of parts hereinjV -mechanism arranged as a vset trigger. is a similar view, showing the hammer set.V Fig. is a similar view showing the setting of g UNrTED STATES rATEN-T oEErcEf EUGENE E. HEDRIGK, or EoRT BAYARD, TERRITORY or NEW MEXICO.

TRIG-GEB MECHANISIVL No. 906,119.V

Patented Dec. 8, 190,8.

Application filed May 27, 1908. SerialV No. 435,251.

To all whom it may concern:

Be it known that I, EUGENE a citizen of they United States, and a resident of Fort Bayard, in the county of Grant andA Territory Vof Newy Mexico, have invented certain new andk useful Improvements in Trigger Mechanism, of which the following is a specification. Y

l. My invention is any improvement in trigger mechanism, and consists in certain novel conafter described and claimed. Y A

Referring to the Vdrawings forming a part hereof. Figure 1. is a central longitudinal section through a gun provided with the trigger mechanism, with theV hammer not set,

and showing the mechanism arranged for plain trigger. Fig. 2 is a similar view showingthe hammer set. Fig. 3 is a similar view showing the hammer not set, and the trigger Fig. 4

the hammer by the action of the guardV lever. Fig. 6 is an enlarged detail section of thetrigj ger mechanism proper, and Fig. 7 is a' top plan view of thesame. .l

` tion, the

In the l ammer 1 is pivoted as at 2 in the frame, and is provided with a forwardly prolpresent embodiment of myinven- `1 nected to Ythe barrel by a screw'. Y The rear face of the hammer is provided-with a curved surface 6, having at'approximately the cen-g AV`ter thereof, a notch 7,*-which is adapted for engagement bya lug8 on the lower sear 9 to be presently described, and the breech block 10 Vis pivoted on'the pivot 2 ofthe hammer.V

The lower sear 9 is provided with a cam sur# facell for engagement by the rounded surface 6 of the hammer, and the lug S before mentioned, is arranged-at the upper endof f thecam surface. .The lower sear'is provided.

. 45 i f received 'between ears y13, on the upper 4searY V14, vand the end of the upper -sear adjacent to said'pivotal connection is pivoted on a pin with anlupwardly extending lug 12,r which is 14?, arranged transversely of the frame.4V Thev rear endof the upper sear'has pivotedthereto the trigger arm 15 and the said arm is prov Vvidedfon its @front face 'with an under-cut Y y notch 16, v,Vvsrrnhich is adapted Yfor engagement by a hookf17jon the lowersear, when thev .partsV are inthe plain trigger position shownin wFigs 1' and 2. kA jchange Vscrew 18 yis F. HEDRIGK,

that when it is desired to use the trigger change screw is loosened until the hook 17 can lbe engaged with the notch 16, after which the vchange screw is tightened vto lock the parts in this position. To arrange the mechanism in set trigger osition, the change screw is loosened until t e hook 17 can be disengaged fromrth'e notch 16, after which the change screw is turned home to its limit. This bringsV the edge of the notch 16 into po-V sition for engagement by aalug on the screw 3,6'isfthreaded through the lower sear, ina diagonalgdirection as shown in Fig. 1 to ing adal .edge of thenotch with the flug."

Whenthe hammer is set ei by the lever l14:, with the trigger mechanism in the plain trigger positionfthe notch 7 of :fthe hammer is engaged-by a lug 377/0311` the mechanismfis'in the settrigger position, the

,tioned. Ineither case the operation of'settrigger mechanism upward'through the engagement of the curved surface 6,' with the return the trigger mechanisminto position,

Iengage the notch 7 of the hammer." The v'plate Yspringe acts not only to operate the hammer, butalso to return the lever 40 to its lclosed position. -The rounded portion 6 of Vthe hammer. acting on thecam surface 11V of the lower sear, serves to move thelug 8 Vthe lug 35 on the u per sear' to engage said notch when the mec anismrisin the set trigparts being -in the position s own in Fig. 6, the lug 35 on the lower Sear is released from the Vedge/of the under cut notch 16, and the It will be evident from the description,v

mechanism in. plain trigger position, the

lower sear, as shown in Fig."6,xand.a set pted torlimit theV engagement of theV upper Sear, asshown in Fig; 2, but whenthe V Acurved surface '511, and the spring 29 acts to' away from the notch 7, and alsoV to permit.

ger' position. V*When the trig" er is pulled, theY 6 inclusive, the free end ofV the set screw bether by hand or Vnotch is engaged bythe lug Y8',as before .men- Y A ting the hammer swings the rear end ofthe such that either the lug Sfor the'lug 37 will loo Yile

action of the hammer spring tends to move said hammer forward. This movement forces the pivotal connection of the sears backwardly away from the hammer, and the engagement of the curved surface 6 of the hammer with the lower end 11 of the sear, forces the projection 8 of the sear out of the engagement with the notch 7 of the hammer. When the parts are in the position shown in Figs. 1 and 2, the bodily movement of the trigger, positively releases the lug 37 of the upper sear from the notch 7 of the hammer.

It will be obvious from the description, that by loosening the change screw, and engaging the shoulder 17 with the notch, 16,

and afterwards tightening the change screw, the mechanism will act as a plain trigger, the upper sear engaging the hammer when the gun is cocked, and a considerable pull will be necessary to release the hammer.

By placing the change screw in the position shown in Figs. 3, 4 and 6, the edge of the notch 16 will engage with the lug 35, and the extent of the engagement may be varied by the set screw 36, so that a moderately heavy or extremely light pull on the trigger will release the hammer. When in this position the lower sea-r engages the hammer.

It will be observed that all of the arts are actuated by the plate spring a, t ie small spring 29 being for the purpose only of returning the trigger mechanism to its original position when moved backwardly and upwardly by the curved portion of the hammer.

l claim: i

1. The combination with the hammer having a curved rear face and an upwardly facing notch, of a pivotally mounted upper scar having a lug for engaging the notch, a lower sear pivoted to the upper sear, and having a cam surface for engagement by the curved surface of the hammer, and a lug for engaging the said notch, a trigger arm pivoted to the free end of the upper scar, and provided with an undercut notch, the lower scar being provided with a hook for engaging the notch, when the trigger mechanism `is in lain trigger position, and with a shoulder for engaging the edge of the notch when the trigger is in set trigger position, a set screw for limiting the extent of engagement of the shoulder with the edge of the notch, and a change screw threaded through the lower scar, and engaging the upper sear, for locking the hook in engagement with the notch, or for s Jacing the lower scar from the upper sear for the purpose set forth.

2. The combination with a hammer having a curved rear face, and a notch, of a pivotally mounted u )per sear having a lug for engaging the notc i, a lower sear pivoted to the upper sear and having a cam surface for engagement by the curved surface of the hammer, and a lug for engaging the notch, a trigger arm pivoted to the free end of the upper scar, and provided with a notch, the lower sear being provided with a hook for engaging the last named notch, and a shoulder for engaging the edge of the notch, means for limiting the extent of engagement of the shoulder with the edge of the notch, and a change screw threaded through the lower scar, and engaging the upper scar for locking the hook in engagement with the notch, or for s acing the lower scar from the upper sear or the purpose set forth.

3. The combination with the hammer having a curved rear face and an upwardly facing notch, of a pivotally mounted upper scar for engaging the notch, a lower sear pivoted to the upper sear, and having a cam surface for engagement by the curved surface of the hammer, and a lug for engaging the notch, a trigger arm pivoted to the free end of the upper scar, and provided with an undercut notch, the lower sear being provided with a hook for engaging the notch, and with a shoulder for engaging the edge of the notch, means for limiting the extent of engagement of the shoulder with the edge of the notch, and means for locking the hook in engagement with the notch, or for spacing the lower sear from the upper scar for the purpose set forth.

4. In trigger mechanism, a pivotally mounted upper scar, a lower sear plvoted to the upper scar, a trigger arm pivoted to the free end of the upper scar, and provided with an under-cut notch, the lower sear being provided with a hook for engaging the notch, when the trigger mechanism is in plain trigger position, and with a shoulder for engaging the edge of the notch when the trigger is in set trigger position., a set screw for limiting the extent of engagement ofthe scar with the edge of the notch, and a change screw threaded through the lower scar and engaging the upper sear, for locking the hook in engagement with the notch, or for spacing the lbwer Sear.

5. In trigger mechanism, an upper sear pivoted at one end, a lower sear pivoted to the upper Sear, a trigger arm pivoted to the free end of the upper scar, and provided with an under-cut notch, the lower scar being provided with, a hook for engaging the notch, when the trigger mechanism is in plain trigger position, and with a shoulder for engaging the edge of the notch when the trigger is in set trigger position, means for limiting the extent of engagement of the shoulder with the edge of the notch, and means for locking the hook in engagement with the notch, or for saacing the lower scar from the upper sear for the purpose set forth.

6. In trigger mechanism, an upper scar, a lower scar pivoted thereto a trigger arm pivoted to the upper sear, means for locking the sears and the trigger arm in fixed relation with respect to each other, the lower sear beshoulder when in set trigger tion, and means for locking the sears and the trigger arm together whereby to move the lower sear out of engaging position.

Si A trigger mechanism comprising a pivotally mounted upper sear, a lower sear piv-y .oted to the upper Sear, and normally in position forfengagement by the hammer, a trigger -arm pivoted to thefupper sear and having a limited engagement with the lower Sear' whereby to retain the hammer in set posi'- tioinland means for locking the sears and the trigger arm togetherv whereby to move the lower'sear out of engaging position, and

means for varying the extent of the engagementof the triggerarm andthe lower sear.

9.'. A- trigger mechanism comprisingr an up per'searaola ted to engage the hammer, and y pivoted by t e endyadjacent to the hammer,

a 'lower' YSear. for engaging the hammer piv-l oted to theupper sear, said lower sear being normally in positionffor engaging the `hamthe upper sear, and having a limited engagement withY the lower Sear to'prevent swinging movement thereof, means for varying theV extent of engagement, and means for locking the sears and the trigger arm together whereby to move the lower sear out of engaging position.

10. In trigger mechanism, the combination with the pivotally connected sears, of a trigger arm pivoted to the upper sear, and having a limited engagement with the lower sear Vfor thereof wit respect to the upper sear,`means for varyin the extent of engagement, and means for t(locking the sears and the trigger arm to ether for the urpose set forth.v A

reventing swinging movementk 11. n trigger mec anism, the combination with the pivotally connected sears, of a trigger arm pivoted to the upper sear, and having a limited engagement with the lower sear for preventing swinging movement thereof, with respect to the upper sear, and means for locking the sears and the trigger arm together, for the lpurpose set forth.

12. n trigger mec anism, the combination with the pivotally connected sears, of a trigger arm pivotally connected to the upper sear, means in connection with the trigger and the lower sear, whereby said trigger and sear may have a limited engagement with each other, and means for locking the sears and the trigger arm together.

mounted sears, a trigger arm pivoted to one Y sear, and having a limited engagement with the other, and means for locking the sears Y A Vand the trigger arm together. meifa trigger arm pivoted to the free end of EUGENE F. HEDRICK. 

